CalTopo 4+

Backcountry mapping evolved

CalTopo LLC

    • Free



CalTopo for iOS extends your adventures from the desktop to the field. CalTopo contains tools to plan your backcountry adventures including offline topographic maps and aerial imagery, slope angle shading, viewshed analysis, realtime SNOTEL and weather data, and many more options. The mobile apps integrate seamlessly with the CalTopo website allowing realtime syncing with the web application allowing updates to maps and routes to be passed back and forth (while you still have cell service).

If you're traveling off the grid you can download mapping layers and maps that you've created to help guide you on your adventures. When you're back you can sync the record of your journey back to the CalTopo website. No more cumbersome exporting and importing from other apps.

Plan your next adventure today!

Layers Available: (*Indicates Offline Availability)
Map Builder Topo*
Map Builder Hybrid*
Scanned 7.5'*
FS Topo*
Marine Charts
FAA Sectionals
NAIP Imagery (Various Years)*
Shaded Relief
USFS/NPS Visitor Maps
Satellite Daily and Weekly Layers
(Note: Weekly High Res layer requires Pro subscription)
And more...

Overlays Available:
Map Builder Overlay*
Slope Angle Shading* (LIDAR slope angle shading available on/offline)
Parcel Data (Note: Requires Pro subscription)
Public Lands
Motor Vehicle Use*
Realtime weather and SNOTEL data
And many others...

What’s New

Version 1.1.7

Fixed a team account bookmark permission bug.

Ratings and Reviews

4.0 out of 5
89 Ratings

89 Ratings

Abrehm ,

Great information but the app is lacking

1st off, I love CalTopo. I have been using the web version for years and have been a paid member for a while now. The amount of information available in CalTopo is unmatched in my opinion. The only problem that I have with the service is with the interface, especially the app. It is quite slow to load data and seems very buggy. I have to constantly force shut down the app and occasionally restart my phone for it to load things more quickly and properly. It got so annoying that I paid for Gaia to test it out because their app looks great, is quick and responsive pulling data up almost immediately. Unfortunately, while they have most of the data CalTopo has they don’t have all of it so I continue to use CalTopo. I’m really hoping they will get things sorted out in the future. It’s still worth the money bury very frustrating to use at times.

Binginging ,

Must Have CalTopo Account to Use

Original review: This app is not usable unless you have a CalTopo account already - meaning you literally can’t get past the page that says the name of the app. This was not clear based on the app details provided.
Edit to respond to developer: I see the app has been updated. I downloaded the newly updated app and this issue has been resolved. Not only can you create an account where you would expect to be able to create an account within the app, but they’ve included options to use Apple, Google, Facebook and more (which I personally appreciate). My initial rating has been updated pending further review of the actual functionality of the app.

Developer Response ,

Thank you for the feedback - you can create a free account from that page. Are you having trouble creating an account? If you need assistance in creating an account please shoot us an e-mail at and we're happy to help you get set up!

jeffyyyyy2000 ,

Best maps anywhere, horribly buggy app

CalTopo has all of the Forest Service maps which seem not to really be available elsewhere online. They are invaluable. Their web interface is great. However the iOS app is incredibly buggy. Map tiles go missing when you scroll despite having previously downloaded them, the FS Topo 2016 maps appear black and are not really useful versus the way they do appear on the website, the download interface has issues, the map periodically crashes, etc. It would be the best outdoors mapping app ever if they just fixed these navigation, map scrolling/zoom/management/download issues. I dare not go into the wilds alone with this as my sole map app for this reason (have had cases where I am is a tile that won’t render at all), but when it does work, it’s great.

App Privacy

The developer, CalTopo LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Location
  • Identifiers
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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